Boring head



J. R. BLANCO Aug. 14, 1951 BORING HEAD 2 Sheets-Sheet 1 Filed NOV. 25, 1947 Fig. 2.

Joseph R. B/anco Aug. 14, 1951 J. R. BLANCO 2,564,460

BORING HEAD Filed Nov. 25, 1947 2 Sheets-Sheet 2 Fig. 4.

Inventor Joseph R. B/an co @maofiw Wynn; 19%

Patented Aug. 14, 1951 BORING HEAD Joseph R. Blanco, Gardena, Calif., assignor of :one-half to Albert 0. Boderman, Long Beach, I

Calif.

Application November 25, 1947, Serial No. 787,900

3 Claims.

provements in boring heads and the object of the present invention is to provide a boring head including a body and novel and improved means for adjustably securing the body to a tool holding member.

Another important object of the .present invention is to provide a boring head so designed as to facilitate the same to tightly support a tool holding member even though the device may become worn during excessive use.

A further object of the present invention is to provide a boring head all parts of which are quickly and readily disassembled or assembled facilitating the convenient storing and packing for transporting or for inspection or replacement of parts.

A still further aim of the present invention is to provide a boring head that is simple and practical in construction, strong and reliable in use, neat and attractive in appearance, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is an elevational view of the boring head constructed in accordance with the present invention, and showing the same in supporting a boring tool (shown in parts) Figure 2 is a longitudinal vertical sectional view of the present boring head taken substantially on the plane of section line 2-2 of Figure 1, and showing the tools supported thereby in elevation;

Figure 3 is a transverse horizontal sectional view taken substantially on the plane of section line 3-3 of Figure 2; and

Figure 4 is a group perspective view of the present boring head.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I represents a substantially vise-like cylindrical body of metallic material comprising an annular head portion I2 and a reduced externally threaded neck or end portion I4.

Integrally formed with the outer face of the head portion I2, is an annular anchor or stop plate l6 of a diameter slightly greater than the gaging bore His-centrally located inthe block ably engages bore 48.

diameter of the head I2. Integrally formed "at the center of the plate I 6, is a stud or cylindrical projection I8 that is adapted to be engaged by a suitable tool for imparting a rotation'to the body I0.

A substantially rectangular loore'or seat 20 extends axially throughthe body I0 and oneend of the seat is closed by the anchor or stop plate I6.

Opposed longitudinal slots 22 and 24 are provided in the threaded neck I4 of the body, extend partially into the end portion I2, and terminate inkey ways or enlarged channelsZB. These slots .and key ways communicate with the seat 20, so

that the enlarged substantially head or key portion 28 of an integral tool holding block '30 may slide into the key ways and at the sametime the block 30- may slide into-one of the "slots to be positioned in theseat' 20,*with one end 32 of the block projecting outwardly from the opening and the threaded end I4- of the body.- A toolen- 30 and aligns the longitudinal axis of the body II]. This bore 34 engages one end 36 of a boring tool 38 and adjustable fasteners 40 receivably engaged in internally threaded apertures 4| provided in the end 32 of the block, may be tightened to bear against the end 36 of the boring tool 38.

Frictionally engaging the neck portion I2 of the body I0, is an annular spacer or collar 42 having opposed counter socket apertures or recesses 44 and 46 that align a transverse internally threaded bore 48 provided in the block 30 adjacent the key portion 28 thereof.

Recessed in the aperture 44, is the head portion 50 of a screw threaded rod 52, that receiv- The free end 53 of this rod 52 extends loosely through aperture 46 and terminates co-planar with the outer face of the collar 42. A sleeve or bushing 54 frictionally positioned in aperture 46, and embracing the end 53 of rod 52, engages the key way 26 adjacent slot 24, with the flanged portion 56 of this bushing 54 seated in the aperture 46 to prevent inward movement of the bushing relative to the collar.

,- A ring nut 58 receivably engaged on the end 53 of the rod 52, is also recessed in aperture 46 and bears against the flange portion 56 of the bushing 54. This nut 58 is provided with radially disposed equally spaced lugs 60 that are, engageable with a suitable tool such as a spanner wrench (not shown) whereby the rod 52 may be removed from the collar and tool supporting block.

Adjustably mounted on the threaded end portion I4 of the body I0, is an internally threaded lock ring 62 having knurled annular surface portion 64. This lock ring 62 is provided with a recess 66 that frictionally engages a hardened thrust bushing 68 having its open outer end co-planar with the knurled surface of the lock ring. This bushing 68 is adapted to receive a spanner wrench or the like whereby the lock ring may be adjusted to closelth'e slotssz2' andz24 andthe seat'provided in the body l thus-tightly gripping theblock 30 within the seat.

It should be noted, that the innermost extremity of the block ring 62 is spaced as at 12, which is preferably .020 inch relative to the opposite annular edge 14 of the collar-42'; when the lock" ring is in a completely adjusted position for effecting a gripping action of the body of the tool holding block.

In this manner, when the parts of the device become worn during use, the lock ring may still be adjusted a slight amount so that the body will alwaystightly support the "tool holding block.

In vi'ewofthe foregoingvdescription taken in conjunction with theaccompanying drawings it 'is believed that a clearunderstanding of the construction, operation and advantages of the device will :be 'quite apparentlto' those skilled in this having anannular head portion and an externally threaded-=neckportion; said'body havin a socket intheneck-portion thereof; diametrically opposed longitudinal key slots providedinsaid body =c0m municating with said socket, a tool holding block loosely received in said slot, a keyway provided in said body communicating with said slots, said block having a head portion slidably received in said keyway, a collar embracing the head portion of said body and having diametrically opposed openings therein, an internally threaded bore providedin-saidLbloclcii registry with the openings in said collar, a screw-threaded rod extending between the openings in said collar and receivably engaging the bore in said block, and a. locking ring receivably engaging the neck portion of said body for contracting the neck portion of saidbodytogrip the block.

2. The combination of claim 1 wherein said locking ring includes a recess, and a tool receiving 'bushingmounted in and reinforcing said recessb 3; The combination of claim 1, said collar and said ring having a space therebetween when the latter is in a-completely adjusted 1 position effecting a gripping acti0n=of" the body-on theb'lock whereby when the collar: and ring become worn during use, the lock ring may still be adjusted a slight amount 'solthat' the 'body willfalways. tightly support the block.

JOSEPH'RE BLANCO.

REFERENCES Gl' -I ED The following references are of record in: the file of this patent:

UNITED STATES PATENTS Greah Britain'; lApr-*. 29, 19-20 

